Centrifugal machine



(No Model.) '2 Sheets-Sheet 1. G. M. NBWHALL.

OENTRIPUGAL MACHINE.

No. 278.250. Patent g dgll gy 22,1883.

VVZTNESSES" INVENTOR (No Model.) 2Sheets-Sheet 2. G. M. NEWHALL.

GENTRIFUGAL MACHINE.

No. 278,260. Patented May 22,1883.

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/@ [NI/ENTOZZ Pmwuma n w, Washington 11c.

UNITE STATES- PATENT OFFICE.

G'EORGEM. NEWHALL, OF PHILADELPHIA, PENNSYLVANIA.

CENT'RIFUGAL MACHINE.

, SPECIFICATION forming part f Letters Patent at. 278,260, dated May 22, 1883.

Application filed April 2, 1883. (No model.)

To all whom it may concern:

Be it known that I, GEORGE M. N EWHALL, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvementsin Centrifugal Machines, of which the following is a specification.

My invention relates to certain improve-' ments in centrifugal machines used in sugarhouses; and the object of my improvements is to insure the thorough draining of the sugar at points in the cage wherein ordinary machines of this class it has usually accumulated in partly-undrained masses.

In the accompanying drawings, Figure 1, Sheet 1, is a vertical section of a centrifugal machine illustrating my improvement; Fig. 2, a sectional plan on the line 1 2; Fig. 3, Sheet 2. a vertical section of part of the machine; Fig. 4, a section on the line 3 4, Fig. 2; and Fig. 5, a perspective view, afi'ordinga further illustration of my improvement. Figs. 3, 4, and 5 are drawn to an enlarged scale.

As regards the general construction'of the centrifugal machine, it does not differ, exceptqrin'g in the particulars explained hereinafter,

l t for the free escape of the sirup at these points from ordinary machines of this class. There is the usual outer casin g composed of the hollow cylinder A, cap-ring a, and base I), having an outlet, 0. The cage has the usual screen,

B, secured at the top to the ring E and at the bottom to the plate D, to which the ceutral shaft, G, is attached in the ordinary manner, openings din the plate being closed by the usual valve, F, excepting when the contents of the cage have to be discharged through the said openings.

In draining sugar by ordinary centrifugal machines a portionof the mass at the lower corner of the cage,and indicated by the dotted lines a w in Fig. 1, always retains more or less sirup, and this is a source ofinconvenience in sugar-houses. The same thing also occurs, but to a less extent, at the upper corner, asindicated by the dotted lines 51 3 This is owing to the fact that there are not thesame avenues that the main body of the screen affords.

My improvement, which I will now proceed to describe, has been designed for the purpose of obviating this difficult To the plate D, I secure a number of plates,

H, preferably of cast-iron, the plates being subst'antially of the form shown in Fig.2, and being in contact, or nearly so, with each other,

and extending all around the cage, with their .in the perspective view, Fig. 5, 0 being the radial grooves, and I the perforated cover,

. which may be attached thereto byturning the edges under the plate, as shown in. Fig. 4.

In the vertical section, Fig. 3, I have shown on an enlarged scale the relation of the plate and its perforated cover to the ordinary screen, B.

The mode which I prefer of securing the grooved plates to the plate D is by stud-bolts to, passing through holes in the said plate D and provided with nuts beneath the same.

It will be seen that whatever sirup'may be V induced, through the action of centrifugal force, to pass through the interstices of the cover I will be directed through the channels formed by t-he grooves e to the screen B, and

will pass through the same, so that there can be no such accumulation of coagulated or partially-drained sugar as I have referred to above.

The grooves may be made directly in the plate D, and the perforated cover attached directlythereto; but I prefer the plates H, constructed for attachment to the said plate D, mainly because they can be readily applied to the cages of existing centrifugal machines. The same system of plates and perforated covers' may be applied to the under side of the cap-ring E of the cage, or the under side of the said ring may be grooved and provided with a perforated cover; but, as before re marked, there is not the same necessity for the drainage of the upper corner of the cage as there is for draining the lower corner.

I claim asmy invention- 1. A centrifugal-machine cage in which the lower plate provided with grooves and with a perforated cover are combined with the screen B, substantially as set forth.

2. The combination of the plate D and screen substantially as set forth.

5. A grooved plate having its outer edge made in the are of a circle, and having a per- 1 forated cover, the whole being constructed for application to the cage of a centrifugal machine, and for combination with similar grooved and covered plates, substantially as specified.

. In testimony whereof I have signed myname 20 to this specification in the presence of two l subscribing witnesses.

' GEORGE M. NEWHALL.

Witnesses HARRY L. ASHENFELTER, HENRY HOWSON, J r. 

